SPECS: Weight: 3.9 oz. Dimensions: 4.7 x 12.1 inches BPA Free and FDA approved Microfilter lasts up to 500 gallons pore size: 0.2 micron TECHNOLOGY: Protects against 99.99999% of bacteria, 99.999% of parasites, and 99.999% of microplastics, silt, sand, and cloudiness Enhanced microfilter performance: Our re-engineered membrane and custom backwash accessory means better performance against sand and silt, maintaining great flow over the long haul FEATURES: Ultra-compact, our reconfigured filter is tiny but mighty with a super packable kit that doesn't sacrifice weight or space Extreme durability: 2x thicker, premium materials make it tougher and ultra leak-proof Highly versatile means the collapsible squeeze bottle system is designed with every occasion in mind. Use as a bottle, squeeze water through it into cooking containers or other drinkware, use as a straw, remove the filter to use as a storage system, or connect to other Peak Series systems Includes: LifeStraw Peak Series 1L collapsible squeeze bottle with screw-top cap and tether, backwash accessory, user manual Your purchase has impact: One purchase of a LifeStraw product provides safe water for one child for a full year LifeStraw is proud to be a B Corp and Climate Neutral Certified brand, committed to meeting the highest standards of verified social and environmental performance, transparency and accountability